Preparation of anatase/TiO2(B) TiO2 nanosheet for high performance of photocatalytic reduction of CO2

The biphases TiO2 nanosheet [anatase and TiO2(B)] was prepared by a solvothermal method, and characterized by FESEM, TEM, XRD, HRTEM, Raman spectrum, UV–Vis DRS and N2 adsorption–desorption. The photocatalytic performance of prepared samples was evaluated by reduction of CO2. The results revealed that the catalyst possessed a high performance of reduction CO2 to methanol. The concentration of catalyst was a crucial factor for the yield of methanol. The possible reason for high photocatalytic activity was forming a heterojunction between two crystal phases, which can promote the separation of electron–hole pairs and prolong it’s lifetime.